src/cpu/x86/vm/x86_64.ad

rev 3201 : 7153034: Fix of 6658428, emitting popcount on platforms without support
Summary: 6658428 errounously assumed match_rule_supported took hw into account
Reviewed-by:
Contributed-by: nils.eliasson@oracle.com

@@ -1712,10 +1712,18 @@
 
 const bool Matcher::match_rule_supported(int opcode) {
   if (!has_match_rule(opcode))
     return false;
 
+  switch (opcode) {
+    case Op_PopCountI:
+    case Op_PopCountL:
+      if (!UsePopCountInstruction)
+        return false;
+    break;
+  }
+
   return true;  // Per default match rules are supported.
 }
 
 int Matcher::regnum_to_fpu_offset(int regnum)
 {